Understanding the Different Types of Argon for Welding

Date Posted:9 January 2023

Welding is a critical process in many industries, such as construction and automotive, for joining two pieces of metal together. Argon is an inert gas used in welding to protect the weld from contamination and oxidation.

Argon is defined as a noble gas, which means it is completely chemically inert. This makes it an ideal choice for welding, as it does not react with other elements in the atmosphere or the metal itself. Argon is used in various welding processes, such as metal-inert gas (MIG) welding and tungsten-inert gas (TIG) welding.

While it is the most popular shielding gas for welding, different types of argon are used for various welding processes. Understanding the different kinds of argon and their applications is essential for any welder.

Type 1 - Pure Argon (Ar)

Pure argon is the most common type of argon used in welding. It is used in MIG and TIG welding processes because it provides a protective shield against oxidation and other contaminants. The argon helps to prevent the welded area from becoming contaminated and keeps it free of oxides, which can weaken the weld. Pure argon is also used in gas metal arc welding (GMAW) processes.

Type 2 - Different Argon Mixtures

Argon-oxygen mixtures combine gases used in welding processes that require more heat. Oxygen is added to the argon, creating a more stable and powerful arc that can be used on thicker metals such as aluminium and stainless steel. This arc is well-suited for welding in tight spaces and gives welders an extra heat boost to complete their work.

Welding with an argon-nitrogen mixture allows for a higher heat input than just argon alone. This mixture is often used for welding thicker materials, or in tight locations where increased heat input is necessary. Adding nitrogen to argon creates a more stable arc and provides an improved welding experience. This type of argon is ideal for welding carbon steel and stainless steel.

Argon and hydrogen can be combined to create a welding gas that increases the heat input of welding applications. This combination is beneficial when welding thicker materials or in tight spaces. When used together, argon and hydrogen create a more stable arc and generate a higher heat input, which can be beneficial for welding aluminium and stainless steel.

Conclusion

Welders must understand the different types of argon used for welding, such as pure argon, argon-helium mixtures, and argon-carbon dioxide mixtures. Pure argon is often used in thin metal welding. In contrast, argon-helium mixtures may be used in medium-thick metal welding, and argon-carbon dioxide mixtures may be used in thicker metal welding. Each mixture has its advantages and disadvantages, and understanding the difference between them can help welders to choose the suitable shielding gas for the right type of welding application.

For welding supplies in Australia, check out National Welding and Industrial Supplies. We are the leading welding equipment supplier, so you can expect only the best from us. Explore our collection of modern welding equipment and place your order today!

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